Senior Developer
Critical Mass
About this role
A Senior Front-End Developer will lead the design, implementation, and maintenance of web interfaces while owning front-end architecture and technical decisions. The role involves collaborating with designers, back-end engineers, and project managers, mentoring junior developers, and leading smaller projects to deliver accessible, responsive, and high-quality user experiences. New hires are expected to work from the office a minimum of three days per week.
Skills
About Critical Mass
criticalmass.comCritical Mass is an award‑winning, full‑service digital experience design and marketing agency founded in 1995 and headquartered in Calgary, Canada. With a relentless focus on the customer, they combine strategy, design, technology and marketing to create digital products and experiences that drive business growth. Critical Mass serves global clients from offices across the US, UK, Hong Kong and South America.
Recent company news
InvestopediaUnderstanding Business Critical Mass: Key Insights and Examples
Dec 5, 2025
DigidayCritical Mass, Rare Beauty and Olipop are among winners of this year’s WorkLife Awards
1 month ago
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1 week ago
The Arkansas Democrat-GazetteCRITICAL MASS | OPINION: Flattop guitar dominates a century later
4 weeks ago
Cox Automotive Inc.EV Inventory Reaches Critical Mass in U.S.
Sep 16, 2025
About Critical Mass
Headquarters
San Francisco, CA
Company Size
201-500 employees
Founded
2018
Industry
Technology
Glassdoor Rating
4.2 / 5
Leadership Team
Sarah Johnson
Chief Executive Officer
Michael Chen
Chief Technology Officer
Emily Williams
VP of Engineering
David Rodriguez
VP of Product
Jessica Thompson
Chief Financial Officer
Andrew Park
VP of Sales
Unlock Company Insights
View leadership team, funding history,
and employee contacts for Critical Mass.
Salary
$151k – $201k
per year